Impletosphaeridium polypes subsp. densum

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"subsp. densum" He Chengquan and Li Peng, 1981, p.65, pl.31, figs.14-17; text-fig.6.  Holotype: He Chengquan and Li Peng, 1981, pl.31, fig.14; text-fig.6.  NOW Impletosphaeridium densum.  Originally Impletosphaeridium polypes subsp. densum, subsequently Kiokansium polypes subsp. densum, thirdly (and now) Impletosphaeridium densum.  Age: Late Oligocene. Parent: Impletosphaeridium polypes